Wang Hong-Lei, Liu Si-Han, Sun Jie-Juan, Liu Huan-Wu, Zhao Tian-Liang, Pei Yu-Xuan, Ke Yue, Wu Zi-Hao, Liu Shi-Yun
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China.
Xi'an Environmental Monitoring Station, Xi'an 710119, China.
Huan Jing Ke Xue. 2023 Apr 8;44(4):1890-1898. doi: 10.13227/j.hjkx.202205254.
To study the emission characteristics of carbonaceous aerosol in particulate matter emitted from vehicle exhaust and main civil combustion fuels, organic carbon (OC) and elemental carbon (EC) in PM and PM samples from vehicle sources (gasoline vehicles, light duty diesel vehicles, and heavy duty diesel vehicles), civil coal (chunk coal and briquette coal), and biomass fuels (wheat straw, wood plank, and grape branches) were collected and analyzed by using a multifunctional portable dilution channel sampler and the Model 5L-NDIR OC/EC analyzer. The results showed that there were significant differences in the proportion of carbonaceous aerosols in PM and PMfrom different emission sources. The proportions of total carbon (TC) in PM and PM of different emission sources were 40.8%-68.5% and 30.5%-70.9%, respectively, and the OC/EC were 1.49-31.56 and 1.90-87.57, respectively. The carbon components produced by different emission sources were dominated by OC, and the OC/TC values in PM and PM were 56.3%-97.0% and 65.0%-98.7%, respectively. The proportions of OC in carbonaceous aerosols in PMand PM were in the descending order of:briquette coal>chunk coal>gasoline vehicle>wood plank>wheat straw>light duty diesel vehicle>heavy duty diesel vehicle and briquette coal>gasoline car>grape branches>chunk coal>light duty diesel vehicle>heavy duty diesel vehicle, respectively. The main components of carbonaceous aerosols in PM and PM emitted from the various emission sources were different, and source apportionment of carbonaceous aerosols could be accurately distinguished by their ingredient composition profiles.
为研究机动车尾气及主要民用燃烧燃料排放颗粒物中碳质气溶胶的排放特征，利用多功能便携式稀释通道采样器和5L-NDIR型OC/EC分析仪，采集并分析了机动车源（汽油车、轻型柴油车和重型柴油车）、民用煤（块煤和型煤）以及生物质燃料（小麦秸秆、木板和葡萄枝）的PM和PM样品中的有机碳（OC）和元素碳（EC）。结果表明，不同排放源的PM和PM中碳质气溶胶的比例存在显著差异。不同排放源PM和PM中总碳（TC）的比例分别为40.8%-68.5%和30.5%-70.9%，OC/EC分别为1.49-31.56和1.90-87.57。不同排放源产生的碳组分以OC为主，PM和PM中OC/TC值分别为56.3%-97.0%和65.0%-98.7%。PM和PM中碳质气溶胶中OC的比例依次为：型煤>块煤>汽油车>木板>小麦秸秆>轻型柴油车>重型柴油车和型煤>汽油车>葡萄枝>块煤>轻型柴油车>重型柴油车。各排放源排放的PM和PM中碳质气溶胶的主要成分不同，可通过其成分组成特征准确区分碳质气溶胶的来源。
